基于Simics的系统级故障注入平台

摘要

故障注入技术是评价系统可靠性的有效方法。现有基于仿真的故障注入平台大多基于现场可编程门阵列或超高速集成电路硬件描述语言实现，对故障模型的支持非常有限。为此，基于Simics结构级模拟器，设计并实现系统级硬件故障注入平台。该平台上层支持不同固件、操作系统以及应用程序，底层支持对处理器典型流水部件的故障注入，同时实现瞬时故障、永久故障和间歇故障模型以及其他较全面的故障类型，并将一组系统级故障检测机制集成入平台中。实验通过监测硬件故障在系统级的传播，对比分析了故障对不同部件造成的系统级影响，结果表明，瞬时故障对系统影响较小，永久故障容易引起系统失效，间歇故障对各部件有不同程度的干扰作用。%Fault injection provides an effective method to evaluate the reliability of system,which is a complex topic in multicore situation. There are many simulation-based fault injection tools now,most of which are implemented by Field Programmable Gate Array(FPGA) and Very High Speed Integrated Circuits Hardware Description Language(VHDL), with limited fault models. Based on the widely used system simulator Simics in computer architecture,this paper designs and implements a system level fault injection platform,supporting different firmware,OS and applications. It can inject faults into several components,with different fault models( including transient faults,permanent and intermittent faults) and most fault types. Further more,it integrates fault detection module into the system. After observing of the propagation of hardware faults in system,it analyzes the effect of different components,fault models on system level,inspiring fault detection,and finds that transient faults have a little impact on system, while permanent faults seriously interrupt the running and intermittent faults performs differently on different components.